A 12-year-old Chinese girl is thought to be in 'extreme danger' after she was abducted from Washington, DC's airport during a group tour

An Amber Alert has been issued for 12-year-old JinJing Ma, a Chinese tourist who was apparently abducted from Reagan Airport outside of Washington, DC on Thursday morning.

JinJing separated from her tour group before going through security, and met up with a middle-aged Asian woman who she left the airport with.

The two got into a white Infiniti QX70 driven by a man, who is also a suspect in the alleged abduction.

While JinJing does not appear to have left by force, authorities say she is still in "extreme danger" due to her young age.

Investigators say JinJing was approached by a couple while touring the World Trade Center on the group's stop in New York City, and they believe the incidents are connected.

Police are searching for a 12-year-old Chinese girl they say was abducted from a Washington, DC-area airport while visiting the US with a tour group.

JinJing Ma was last seen leaving Ronald Reagan Washington National Airport with an unknown woman Thursday morning around 8:15 a.m. Police issued an Amber Alert eight hours later, warning that JinJing is "believed to be in extreme danger" due to her young age.

Police say JinJing was traveling the U.S. with a tourist group, which arrived at Reagan on Thursday morning to catch a flight to the West Coast for the next leg of their journey after sightseeing in New York City and DC.

JinJing was given her passport when the group arrived at the airport. Just before the group started going through security, she excused herself, saying she needed to use the restroom.

Investigators say she met up with a middle-aged woman, exchanged clothes, and left the airport with the unknown alleged abductor. The two exited through the Terminal C Arrivals area, where they got into a white Infiniti QX70 with New York license plates, driven by a man.

JinJing's group noticed she was missing shortly after.

Additional security footage released by the Metropolitan Washington Airports Authority (MWAA) Thursday night shows what is believed to be the same man and woman arriving at the airport's ticketing and departures area earlier that morning. Both are considered suspects in the abduction.

Another photo released by the MWAA shows JinJing leaving the airport with her female captor.

MWAA Police Chief David Huchler told CBS that JinJing may have known her captors and left willingly.

"The child appears to have left without any force. She entered the vehicle without any force, but that does not release any of our concerns," he said.

Police say a couple approached JinJing when her group was touring the World Trade Center site on their stop in New York (it's unclear what day this happened). Investigators said there appeared to be some familiarity between the three, but they can't say for certain whether the conversation was cordial.

A witness also told cops that he saw the couple hand the girl food. It's unclear if the couple in New York are the same couple who collected JinJing from the airport, but investigators believe the two incidents are connected.

Police are working to contact JinJing's grandfather in China, and learn whether she has any relatives in the US.

JinJing is about four feet, 11 inches tall and weighs about 90 pounds. She is Asian and has black hair and brown eyes.

The Metropolitan Washington Airports Authority said she was last seen wearing a white t-shirt, blue jeans and a black jacket.

The woman they say abducted her is described as Asian, about 40 years old with black hair. They say she was wearing a black dress.

In addition to the MWAA, several other law enforcement agencies are aiding in the search for JinJing, including the FBI, the Virginia State Police, and the National Center for Missing & Exploited Children.

Anyone with information on JinJing or her abductors' whereabouts is being asked to call 911 or the MWAA at 703-417-2400.